A system including an elevator to move a tubular, the elevator including two or more remotely operable latches that can configure the elevator to handle various tubular diameters. A portion of the latches can be laterally offset from each other and another portion can overlap adjacent latches. The elevator can be Atmosphere Explosible (ATEX) certified or International Electrotechnical Commission for Explosive Atmospheres (IECEx) certified according to explosive (EX) Zone 1 requirements with an electronics enclosure contained within a sealed chamber. The elevator can be rotated greater than 90 degrees relative to a pair of links that support the elevator. The elevator can use rotary actuators to operate the latches and rotate the housing of the elevator.
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1. A system for conducting subterranean operations comprising:
an elevator configured to move a tubular, the elevator comprising:
a housing defining a central bore configured to receive the tubular therein;
a first latch comprising first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position;
an electronics controller disposed in an electronics enclosure within the housing and configured to control the elevator to handle the tubular;
an energy storage device that powers the elevator when external power to the elevator is interrupted, wherein the energy storage device is disposed within the electronics enclosure; and
a hydraulic generator, wherein the hydraulic generator generates electrical energy for operation of the elevator.
2. The system of
3. The system of
4. The system of
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This application is a divisional of and claims priority to U.S. patent application Ser. No. 16/674,247 (now patented as U.S. Pat. No. 11,008,820) filed on Nov. 5, 2019 by Jan FRIESTAD et al., and entitled “ELEVATOR WITH A TILTABLE HOUSING FOR LIFTING TUBULARS OF VARIOUS SIZES,” which claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 62/756,421, entitled “ELEVATOR WITH A TILTABLE HOUSING FOR LIFTING TUBULARS OF VARIOUS SIZES,” by Jan FRIESTAD et al., filed Nov. 6, 2018, of which both are assigned to the current assignee hereof and are incorporated herein by reference in their entireties.
The present invention relates, in general, to the field of drilling and processing of wells. More particularly, present embodiments relate to a system and method for manipulating tubulars during subterranean operations.
Top drives are typically utilized in well drilling and maintenance operations, such as operations related to oil and gas exploration. In conventional subterranean (e.g., oil and gas) operations, a wellbore is typically drilled to a desired depth with a tubular string, which can include drill pipe and a drilling bottom hole assembly (BHA). Casing strings can be assembled and installed in the newly drilled portion of the wellbore. During the subterranean operation, a tubular string (e.g., tubular string, casing string, production string, completion string, etc.) may be supported and hoisted about a rig by a hoisting system for eventual positioning down hole in a well. The top drive along with an elevator and a pipe handling system may be used to manipulate tubular segments and tubular strings to extend the tubular string into the wellbore or retrieve the tubular string from the wellbore.
When the tubular string is being extended into the wellbore, a pipe handling system may manipulate tubulars (e.g., single, double, or triple stands) from a pipe storage area (e.g., vertical or horizontal tubular storage) to the top drive via assistance of an elevator. The tubular can be connected to the top drive, which may manipulate the tubular to be positioned over and then connect the tubular to a tubular stub extending from the wellbore. When the tubular string is being retrieved from (or “tripped” out of) the wellbore, a tubular string can be hoisted by the top drive unit and tubular segments (e.g., single, double, or triple stands) can be disconnected from a proximal end of the tubular string via the top drive and manipulated to a pipe storage area (e.g., vertical or horizontal tubular storage) via assistance by the elevator and the pipe handling system.
However, due to the various diameters of tubulars that may be needed during the subterranean operation, the elevator is normally reconfigured during the operation by replacing latching jaws in the elevator with jaws configured to accommodate different size tubulars. This reconfiguration is normally performed manually by rig operators. This manual process of reconfiguring the elevator when different size tubulars are needed takes up valuable rig time and reducing this impact on rig time can be beneficial.
In accordance with an aspect of the disclosure, a system can include an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore on opposite sides of, with respect to each other, a central axis of the central bore and define an opening of a first diameter; and a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a second diameter which is different than the first diameter, where the first jaw is fixedly attached to a first drive shaft and the first drive shaft is rotationally attached to the housing, where the third jaw is fixedly attached to a third drive shaft and the third drive shaft is rotationally attached to the housing, and where the first and third drive shafts independently rotate the first and third jaws, respectively, about a first axis.
In accordance with another aspect of the disclosure, a system for conducting subterranean operations can include: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein, the central bore having a central axis; and a link interface system configured to rotate the housing up to greater than 90 degrees about a housing axis.
In accordance with another aspect of the disclosure, a system for conducting subterranean operations can include: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore; a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore; and an electronics enclosure within the housing, with the electronics enclosure configured to be ATEX certified or IECEx certified according to ex zone 1 requirements.
In accordance with another aspect of the disclosure, a system for conducting subterranean operations can include: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore on opposite sides of, with respect to each other, a central axis of the central bore and define an opening of a first diameter; a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a second diameter which is different than the first diameter; and an electronics controller disposed in an electronics enclosure within the housing and configured to control the elevator to handle the tubular.
In accordance with another aspect of the disclosure, a system for conducting subterranean operations can include: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are configured to form a first frustoconically shaped portion positioned in the central bore and surrounding a central axis of the central bore, where the first frustoconically shaped portion defines an opening of a first diameter; and a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are configured to form a second frustoconically shaped portion positioned in the central bore and surrounding the central axis of the central bore, where the second frustoconically shaped portion defines an opening of a second diameter which is different than the first diameter, where the first frustoconically shaped portion includes a first gap between the first and second jaws when the first latch is in the engaged position, and where the second frustoconically shaped portion includes a second gap between the third and fourth jaws when the second latch is in the engaged position, and where the first and second gaps are parallel to the central axis, and the first gap is circumferentially offset, relative to the central axis, from the second gap.
These and other features, aspects, and advantages of present embodiments will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
Present embodiments provide an elevator that provides remote actuation of multiple latches to accommodate various diameter tubulars (including tubular stands and tubular strings) and to rotate the elevator relative to a pair of links (or bails) to align the elevator to the tubulars. The elevator comprises rotary actuators for manipulating the latches between engaged and disengaged positions, where a tubular would be latched (or engaged, retained, etc.) when the appropriate latches are in the engaged position and released when the latches are in the disengaged position. The elevator may also comprise a rotary actuator for rotating the elevator relative to the links. The aspects of various embodiments are described in more detail below.
A tubular drive system 40, hoisted by the traveling block 22, can collect the tubular 38 from a pipe handling system 60 and position the tubular 38 above the wellbore 30. In the illustrated embodiment, the tubular drive system 40 includes a top drive 42, an elevator 100, and a pair of links that couple the elevator to the top drive 42. The tubular drive system 40 can be configured to measure forces acting on the tubular drive system 40, such as torque, weight, and so forth. These measurements can be communicated to a controller 50 used to control various rig systems during the subterranean operation. For example, the tubular drive system 40 may measure forces acting on the top drive 42 via sensors, such as strain gauges, gyroscopes, pressure sensors, accelerometers, magnetic sensors, optical sensors, or other sensors, which may be communicatively linked to the controller 50. The tubular drive system 40, once coupled with the tubular 38, may hoist the tubular 38 from the pipe handling system 60, then lower the coupled tubular 38 toward the stump (or stickup) 36 and rotate the tubular 38 such that it connects with the stump 36 and becomes part of the tubular string 28.
The rig 10 further includes a control system 50, which is configured to control the various systems and components of the rig 10 that grip, lift, release, and support the tubular 38 and the tubular string 28 during a tubular string running or tripping operation. For example, the control system 50 may control operation of the top drive, the elevator, and the power slips 34 based on measured feedback (e.g., from the tubular drive system 40 and other sensors) to ensure that the tubular 38 and the tubular string 28 are adequately gripped and supported by the tubular drive system 40 and/or the power slips 34 during a tubular string running operation. The control system 50 may control auxiliary equipment such as mud pumps, the robotic pipe handler 60, and the like.
In the illustrated embodiment, the control system 50 can include one or more microprocessors and memory storage. For example, the controller 50 may be an automation controller, which may include a programmable logic controller (PLC). The memory is a non-transitory (not merely a signal), computer-readable media, which may include executable instructions that may be executed by the control system 50. The controller 50 receives feedback from the tubular drive system 40 and/or other sensors that detect measured feedback associated with operation of the rig 10. For example, the controller 50 may receive feedback from the tubular drive system 40 and/or other sensors via wired or wireless transmission. Based on the measured feedback, the controller 50 can regulate operation of the tubular drive system 40 (e.g., increasing rotation speed, increasing weight on bit, etc.). The controller 50 can also communicate via wired or wireless transmission to control or monitor the tubular drive system 40 or the elevator 100. Status information regarding the configuration of the elevator 100 (e.g., configuration of the latches, link interface position, orientation of the elevator 100, position of the elevator 100, weight of a tubular held by the elevator 100, error conditions for the elevator 100, environment characteristics of elevator 100 interior, etc.)
The rig 10 may also include a pipe handling system 60 configured to transport tubulars 38 (e.g., single stands, double stands, triple stands) from a horizontal storage to the derrick 14. The pipe handling system 60 can include a horizontal platform 62 that can be raised or lowered (arrows 68 in
It should be noted that the illustrations of
The latches 104 are configured to support various tubular diameters. If tubulars 38 (having the largest diameter supported by the elevator 100) are to be handled, then all latches 104 would be pivoted to a disengaged position to allow the box end 39 of the large diameter tubular 38 to be inserted through a central bore (with axis 84) of the elevator 100 (with a minimal diameter that is larger than the maximum diameter of the box end 39) until the reduced diameter portion 37 is positioned in the central bore. The elevator 100 can then be controlled to pivot one or more of the latches 104 into an engaged position which reduces the minimal diameter of the central bore. In this example, only one of the latches 104 may be pivoted to an engaged position adjacent the reduced diameter portion 37. The engaged latch 104 allows the reduced diameter portion 37 to freely travel through the elevator 100. However, the engaged latch 104 prevents the box end with diameter D9 from passing through the elevator 100 because the inner diameter of the engaged latch 104 is less than the outer diameter D9 of the box end 39. The tubular drive system 40 can then raise and lower the tubular 38 since the engaged latch 104 engages the box end 39 and prevents it from passing through the elevator 100. As smaller diameter tubulars 38 are needed, more latches 104 can be pivoted to an engaged position to engage the smaller diameters D9 of the box ends 39 of the smaller tubulars 38. Additional latches pivoted to an engaged position forms a smaller inner diameter of an opening through the latches 104 that engage the smaller tubulars 38.
Therefore, the enclosure 150 within the sealed chamber 106 of the elevator 100 is configured to meet the standards to be ATEX and IECEx certified according to EX Zone 1 requirements. A hydraulic generator 154 can receive pressurized hydraulic fluid via lines 156 to drive the generator 154, which can produce electrical energy for powering electrical circuitry (such as electronic processors, and programmable logic controllers PLCs) and storing electrical energy in an electrical storage device 152. The storage device 152 is shown connected to the enclosure 150, but the storage device 152 can also be disposed within the enclosure 150 with the generator coupled to the enclosure 150 and the storage device 152 via conductors 158. The storage device 152 can be a battery that stores the electrical energy, but it can also be a capacitor assembly that couples capacitive devices together in the capacitor assembly to provide electrical energy storage that can operate the elevator for at least 5 seconds if the elevator 100 losses power (e.g., generator fails, loss of pressurized hydraulic fluid to generator, etc.). The at least 5 seconds of Uninterruptable Power Supply UPS capability provided by the storage device 152 assumes that no connection operations occur during the power outage. The storage device 152 can provide power to operate the elevator 100 for up to 10 seconds, up to 15 seconds, up to 20 seconds, up to 25 seconds, up to 30 seconds, up to 40 seconds, up to 50 seconds, up to 60 seconds, up to 2 minutes, up to 15 minutes, up to 30 minutes, or greater than 30 minutes. The capacitor assembly can provide significant improvement in obtaining ATEX and IECEx certifications for the elevator 100, since a battery requires additional testing per the EX Zone 1 requirements (or standards).
Referring again to
The rotary actuator 214 is coupled to the jaws 120a, 120b through linkage 234. The jaws 120a, 120b are rotatably attached to the housing through respective drive shafts. Rotating the drive shafts rotate the respective jaws relative to the housing 102 and relative to the central bore of the elevator 100. The linkage 234 is coupled to the drive shafts of the jaws 120a, 120b such that when the rotary actuator 214 is operated, the linkage causes the jaw 120a to rotate about its respective drive shaft in a direction that is opposite a direction the jaw 120b rotates about its respective drive shaft. Therefore, to operate the latch to an engaged position, the rotary actuator 214 can operate the linkage 234 such that the jaws 120a, 120b rotate toward each other until they are in the engaged position and engaging a portion of the jaws 110a, 110b. To operate the latch to a disengaged position, the rotary actuator 214 can operate the linkage 234 such that the jaws 120a, 120b rotate away from each other until they are positioned in the disengaged position as shown in
Similarly, the rotary actuator 216 can operate to rotate the jaws 130a, 130b into and out of an engaged position through the linkage 236. The rotary actuator 218 can operate to rotate the jaws 140a, 140b into and out of an engaged position through the linkage 238.
A first drive shaft 162 is fixedly attached to the jaw 110a, a second drive shaft 164 is fixedly attached to the jaw 110b, a third drive shaft 166 is fixedly attached to the jaw 120a, and fourth drive shaft 168 is fixedly attached to the jaw 120b. The first and third drive shafts 162, 166 are rotatably attached to the housing 102 along an axis 90 and rotate the respective jaws about the axis 90. The first and third drive shafts 162, 166 are also adjacent each other along the axis 90, and laterally spaced apart along the axis 90. Therefore, a portion of the jaw 120a adjacent the third drive shaft 166 does not overlap the jaw 110a when the jaws 110a and 120a are in the engaged position. However, an engagement portion of the jaw 120a overlaps and engages an engagement portion of the jaw 110a when the jaws 110a and 120a are in the engaged position.
Similarly, the second and fourth drive shafts 164, 168 are rotatably attached to the housing 102 along the axis 92 and rotate the respective jaws about the axis 92. The second and fourth drive shafts are also adjacent each other along the axis 92 and are laterally spaced apart along the axis 92. A portion of the jaw 120b adjacent the fourth drive shaft 168 does not overlap the jaw 110b when the jaws 110b and 120b are in the engaged position. However, an engagement portion of the jaw 120b overlaps and engages an engagement portion of the jaw 110b when the jaws 110b and 120b are in the engaged position.
The rotary actuator 216 is coupled to the jaws 130a, 130b through linkage 236. The jaws 130a, 130b are rotatably attached to the housing through respective drive shafts. Rotating the drive shafts rotate the respective jaws relative to the housing 102 and relative to the central bore of the elevator 100. The linkage 236 is coupled to the drive shafts of the jaws 130a, 130b such that when the rotary actuator 216 is operated, the linkage causes the jaw 130a to rotate about its respective drive shaft in a direction that is opposite a direction the jaw 130b rotates about its respective drive shaft. Therefore, to operate the latch to an engaged position, the rotary actuator 216 can operate the linkage 236 such that the jaws 130a, 130b rotate toward each other until they are in the engaged position and engaging a portion of the jaws 120a, 120b. To operate the latch to a disengaged position, the rotary actuator 216 can operate the linkage 236 such that the jaws 130a, 130b rotate away from each other until they are positioned in the disengaged position as shown in
The rotary actuator 218 is coupled to the jaws 140a, 140b through linkage 234. The jaws 140a, 140b are rotatably attached to the housing through respective drive shafts. Rotating the drive shafts rotate the respective jaws relative to the housing 102 and relative to the central bore of the elevator 100. The linkage 238 is coupled to the drive shafts of the jaws 140a, 140b such that when the rotary actuator 218 is operated, the linkage causes the jaw 140a to rotate about its respective drive shaft in a direction that is opposite a direction the jaw 140b rotates about its respective drive shaft. Therefore, to operate the latch to an engaged position, the rotary actuator 218 can operate the linkage 238 such that the jaws 140a, 140b rotate toward each other until they are in the engaged position and engaging a portion of the jaws 130a, 130b. To operate the latch to a disengaged position, the rotary actuator 218 can operate the linkage 238 such that the jaws 140a, 140b rotate away from each other until they are positioned in the disengaged position as shown in
A first drive shaft 162 is fixedly attached to the jaw 110a, a second drive shaft 164 is fixedly attached to the jaw 110b, a third drive shaft 166 is fixedly attached to the jaw 120a, a fourth drive shaft 168 is fixedly attached to the jaw 120b, a fifth drive shaft 172 is fixedly attached to the jaw 130a, a sixth drive shaft 174 is fixedly attached to the jaw 130b, a seventh drive shaft 176 is fixedly attached to the jaw 140a, and an eighth drive shaft 178 is fixedly attached to the jaw 140b.
The first and third drive shafts 162, 166 are rotatably attached to the housing 102 along an axis 90 and rotate the respective jaws about the axis 90. The first and third drive shafts 162, 166 are also adjacent each other along the axis 90, and laterally spaced apart along the axis 90. A portion of the jaw 120a adjacent the third drive shaft 166 does not overlap the jaw 110a when the jaws 110a and 120a are in the engaged position. However, an engagement portion of the jaw 120a overlaps and engages an engagement portion of the jaw 110a when the jaws 110a and 120a are in the engaged position.
The second and fourth drive shafts 164, 168 are rotatably attached to the housing 102 along the axis 92 and rotate the respective jaws about the axis 92. The second and fourth drive shafts 164, 168 are also adjacent each other along the axis 92, and are laterally spaced apart along the axis 92. A portion of the jaw 120b adjacent the fourth drive shaft 168 does not overlap the jaw 110b when the jaws 110b and 120b are in the engaged position. However, an engagement portion of the jaw 120b overlaps and engages an engagement portion of the jaw 110b when the jaws 110b and 120b are in the engaged position.
The fifth and seventh drive shafts 172, 176 are rotatably attached to the housing 102 along an axis 94 and rotate the respective jaws about the axis 94. The fifth and seventh drive shafts 172, 176 are also adjacent each other along the axis 94, and laterally spaced apart along the axis 94. A portion of the jaw 140a adjacent the seventh drive shaft 176 does not overlap the jaw 130a when the jaws 130a and 140a are in the engaged position. However, an engagement portion of the jaw 140a overlaps and engages an engagement portion of the jaw 130a when the jaws 130a and 140a are in the engaged position.
The sixth and eighth drive shafts 174, 178 are rotatably attached to the housing 102 along the axis 96 and rotate the respective jaws about the axis 96. The second and fourth drive shafts are also adjacent each other along the axis 96 and are laterally spaced apart along the axis 96. A portion of the jaw 140b adjacent the fourth drive shaft 178 does not overlap the jaw 130b when the jaws 130b and 140b are in the engaged position. However, an engagement portion of the jaw 140b overlaps and engages an engagement portion of the jaw 130b when the jaws 130b and 140b are in the engaged position.
When operating the latches 110, 120, 130, 140, the first latch 110 is rotated into an engaged position before the other latches 120, 130, 140. The second latch 120 can be rotated into an engaged position after the first latch 110 is actuated to the engaged position and before the other latches 130, 140 are actuated. The third latch 130 can be rotated into an engaged position after the first and second latches 110, 120 are actuated to the engaged position and before the other latch 140 is actuated. The fourth latch 140 can be rotated into an engaged position after the first, second, and third latches 110, 120, 130 are actuated to the engaged position. With all four latches in the engaged position, (as seen in
Referring now to
The central bore 74 of the housing 102 can have a tapered bore with a maximum diameter D1 and a minimum diameter D2. The tapered bore is not a requirement, but the taper can assist in guiding an end of the tubular 38 into the central bore 74. It should be understood that the central bore 74 may not be tapered, such that diameter D1 is equal to diameter D2. However, it is preferred that the central bore 74 is tapered. A spacer ring 108 can be positioned between the housing 102 and the latches 110, 120, 130, and 140 to provide a compression interface between the housing 102 and the latches 110, 120, 130, and 140. The spacer ring 108 can include an inner surface 360, an outer surface 362, a top surface 366, and an engagement surface 364. The inner surface 360 can be tapered toward the center axis 84 which also guides the tubulars 38 into a variable diameter opening through the elevator 100 created by the latches 110, 120, 130, and 140. The spacer ring 108 transmits the compression force from the latches 110, 120, 130, and 140 to the housing 102. The compression forces 54, 56 can be transmitted to the housing 102 through compression sensors 188, 189 that can measure the compression force applied to the elevator 100 by the tubular 38. It should be understood that any number of compression sensors 188, 189 can be used as needed to measure the compression force applied by the tubular 38.
This elevator 100, with the housing in a substantially horizontal orientation, can be configured to support a tubular that weighs up to 1180 metric tons (˜ 1300 short tons), or up to 1134 metric tons (˜ 1250 short tons), or up to 1189 metric tons (˜ 1200 short tons), or up to 907 metric tons (˜ 1000 short tons), or up to 680 metric tons (˜ 750 short tons), or up to 454 metric tons (˜ 500 short tons), or up to 318 metric tons (˜ 350 short tons), or up to 227 metric tons (˜250 short tons). The elevator 100 can be configured to manipulate a tubular 38 between horizontal and vertical orientations with the tubular 38 weighing up to 3000 kg (˜3 short tons). Therefore, when one or more of the latches 110, 120, 130, 140 of the elevator 100 are engaged with a tubular 38 positioned on a horizontally oriented tubular handling system (e.g., system 60), the elevator 100 can engage the tubular 38, hoist the tubular 38 from the horizontal orientation on the handling system (e.g., system 60), and rotate with the tubular 38 to a vertical orientation to enable connection of the tubular 38 to the tubular string 28. The elevator 100 is also configured to manipulate the tubular 38 when it is disconnected from the tubular string 28 from a vertical orientation to a horizontal orientation on the handling system. Seals 370 can seal between the housing 102 and the spacer ring 108 to minimize (or prevent) fluids and debris from entering the space between the housing 102 and the spacer ring 108. The sensors 188, 189 may also incorporate seals that minimize (or prevent) fluids and debris from entering the space between the housing 102 and the spacer ring 108. It is preferred to minimize fluid and debris from entering this space, thereby reducing possible in accurate readings from the sensors 188, 189. It should be understood that other benefits are possible with sealing this space from the fluids and debris.
The elevator 100 can accept tubulars 38 with a maximum diameter that is incrementally less than the diameter D3 of the opening in the spacer ring 108, the opening being defined at the intersection of the engagement surface 364 and the inner surface 360. It should be understood that the inner surface 360 of the spacer ring 108 can be parallel to the tubular 38 instead of being tapered, as shown in
Each jaw 110a, 110b of the first latch 110 includes an engagement portion 114, 118, which includes a lateral portion 112, 116 and a tapered portion 113, 117. Each jaw 120a, 120b of the second latch 120 includes an engagement portion 124, 128, which includes a lateral portion 122, 126 and a tapered portion 123, 127. Each jaw 130a, 130b of the third latch 130 includes an engagement portion 134, 138, which includes a lateral portion 132, 136 and a tapered portion 133, 137. Each jaw 140a, 140b of the fourth latch 140 includes an engagement portion 144, 148, which includes a lateral portion 142, 146 and a tapered portion 143, 147. The lateral portions of each latch overlap the lateral portions of the other latches that are in an engaged position. The tapered portions of each latch engage the tapered portions of adjacent latches when the latches are in the engaged position, as shown in
Jaws 110a, 110b can be rotated into position by the actuator 212 that acts on the drive shafts 162, 164, respectively. The jaws 110a, 110b can include an attachment portion 180, 181, and an engagement portion 114, 118, respectively. The attachment portions 180, 181 are not shown in
Jaws 120a, 120b can be rotated into position by the actuator 214 that acts on the drive shafts 166, 168, respectively. The jaws 120a, 120b can include an attachment portion 182, 183, and an engagement portion 124, 128, respectively. The attachment portions 182, 183 are the portions of the jaws 120a, 120b that attach the jaws to the respective drive shafts 166, 168. The engagement portions 124, 128 are the portions of the jaws 120a, 120b that engage the engagement portions 114, 118 of the first latch 110 when in the engaged position. The lateral portions 122, 126 connect the tapered portions 123, 127 to the attachment portions 182, 183 to form the respective jaws 120a, 120b. The tapered portions 123, 127 transfer compression forces 54, 56 to the spacer ring 108 through the tapered portions 113, 117 and the engagement surface 364 of the spacer ring 108. A bottom surface of the tapered portions 123, 127 can be tapered to facilitate entry of the tubular 38 into the elevator opening.
Jaws 130a, 130b can be rotated into position by the actuator 216 that acts on the drive shafts 172, 174, respectively. The jaws 130a, 130b can include an attachment portion 184, 185, and an engagement portion 134, 138, respectively. The attachment portions 184, 185 are not shown in
Jaws 140a, 140b can be rotated into position by the actuator 218 that acts on the drive shafts 176, 178, respectively. The jaws 140a, 140b can include an attachment portion 186, 187, and an engagement portion 144, 148, respectively. The attachment portions 186, 187 are the portions of the jaws 140a, 140b that attach the jaws to the respective drive shafts 176, 178. The engagement portions 144, 148 are the portions of the jaws 140a, 140b that engage the engagement portions 134, 138 of the third latch 130 when in the engaged position. The lateral portions 142, 146 connect the tapered portions 143, 147 to the attachment portions 186, 187, via the joints 149a, 149b (see
The tapered portions of each pair of jaws can form a frusticonically shaped portion of the respective latch when the latch is in the engaged position. Therefore, the tapered portions 113, 117 can form a frusticonically shaped portion of the latch 110 that engages a frusticonically shaped inner surface 364 of the spacer ring 108. The tapered portions 123, 127 can form a frusticonically shaped portion of the latch 120 that engages the frusticonically shaped portion of the latch 110. The tapered portions 133, 137 can form a frusticonically shaped portion of the latch 130 that engages the frusticonically shaped portion of the latch 120. The tapered portions 143, 147 can form a frusticonically shaped portion of the latch 140 that engages the frusticonically shaped portion of the latch 130.
As can be seen in
Additionally, the axes 90 and 92 are positioned on opposite sides of the central axis 84 and can be spaced away from the central axis 84 by substantially a same first distance. However, in other embodiments, a distance between the axis 90 and the central axis 84 can be different than a distance between the axis 92 and the central axis 84. The axes 94 and 96 are positioned on opposite sides of the central axis 84 and can be spaced away from the central axis 84 by substantially a same second distance. However, in other embodiments, the distance between the axis 94 and the central axis 84 can be different than the distance between the axis 96 and the central axis 84. The same first distance from the axes 90 or 92 to the central axis 84 is preferably less than the same second distance from the axes 94 or 96 to the central axis 84.
As stated above, the central bore 74 of the housing 102 can have a tapered bore with a maximum diameter D1 and a minimum diameter D2. The spacer ring 108 can have a minimum diameter D3, which defines a minimum diameter of the opening 88 through the latches and defines the maximum diameter of a tubular 38 that can be received into the elevator 100 when all latches 110, 120, 130, 140 are in the disengaged position. When the latch 110 is in the engaged position, the minimum diameter of the opening 88 through the latches is diameter D4. Diameter D4 defines the maximum diameter of a tubular 38 that can be received into the elevator 100 when the latch 110 is engaged and the latches 120, 130, 140 are disengaged. Diameter D4 also defines the minimum diameter D9 of a box end 39 that can be retained by the latch 110 when the latch 110 is engaged. When the latch 120 is in the engaged position, the minimum diameter of the opening 88 through the latches is diameter D5. Diameter D5 defines the maximum diameter of a tubular 38 that can be received into the elevator 100 when the latches 110, 120 are engaged and the latches 130, 140 are disengaged. Diameter D5 also defines the minimum diameter D9 of a box end 39 that can be retained by the latch 120 when the latch 120 is engaged. When the latch 130 is in the engaged position, the minimum diameter of the opening 88 through the latches is diameter D6. Diameter D6 defines the maximum diameter of a tubular 38 that can be received into the elevator 100 when the latches 110, 120 are engaged and the latches 130, 140 are disengaged. Diameter D6 also defines the minimum diameter D9 of a box end 39 that can be retained by the latch 130 when the latch 130 is engaged.
When the latch 140 is in the engaged position, the minimum diameter of the opening 88 through the latches is diameter D7. Diameter D7 defines the minimum diameter D9 of a box end 39 that can be retained by the latch 140, and thus the elevator 100, when the latch 140 is engaged. In each configuration of the latches 110, 120, 130, 140, the box end 39 of the tubular 38 should be larger than the minimum diameter of the opening 88 and the radially reduced portion 37 of the tubular 38 should be smaller than the minimum diameter of the opening. For example, when all latches 110, 120, 130, 140 are in the engaged position, the diameter D9 of the box end 39 is larger than the diameter D7, while the diameter D10 is smaller than the diameter D7. Therefore, when the latch 140 is disengaged, the tubular 38 can be inserted through the opening 88 of the elevator 100 since the diameter D9 of the box end 39 is smaller than diameter D6 of engaged latch 130. When the box end 39 is passed through the elevator 100, the latch 140 can then be engaged to decrease the diameter of the opening 88 from diameter D6 to diameter D7, which will prevent the box end 39 from passing back through the elevator 100, since the diameter D7 is smaller than the diameter D9. This operation would perform similarly for larger and larger diameter tubulars 38 when the appropriate latches are engaged with the others disengaged, depending upon the desired configuration.
As stated above, the tapered portions of each pair of jaws can form a frusticonically shaped portion of the respective latch when the latch is in the engaged position.
The jaw 140b includes a top surface 240 of the lateral portion 146 that transitions to a concave inner surface 244 of the tapered portion 147 at a transition surface 242. The inner surface 244 transitions to a distal surface 248 at an engagement edge 246. The concave inner surface 244 tapers toward the central axis 84 from the transition surface 242 to the engagement edge 246. The concave inner surfaces 244 and engagement edges 246 of each jaw are configured to engage the tubular 38 (e.g., box end 39) and can allow for various tubular diameters within a range between the minimum diameters of the adjacent latches without reconfiguring the latches. The concave inner surface 244 can allow for varied manufacturing tolerances of the tubulars 38. When the box end 39 engages any point along the concave inner surface 244, the weight of the tubular is transmitted through the engagement portions of the engaged latches to the spacer ring 108. The distal surface 248 is also concave shaped and forms a tapered surface that is tapered at a different angle from the central axis 84 than the concave surface 244.
The distal surface 248 can taper away from the central axis 84 from the engagement edge 246 to a bottom edge 250. The distal surface 248 transitions to a convex shaped outer surface 252 at the bottom edge 250. The outer surface 252 is configured to complimentarily engage a concave inner surface 244 of the jaw 130b. The outer surface 252 transitions to a bottom surface 256 of the lateral portion 146 at a transition surface 254. In this embodiment, the lateral portions 146, 136 of the jaws 140b, 130b, respectively, are substantially parallel to each other and longitudinally spaced apart. The longitudinal space between the lateral portions 146, 136 directs the compression forces 56 to be transmitted through the tapered portions 147, 137 with minimal compression forces, that are applied by an engaged tubular to the elevator 100, to be directed through the lateral portions 146, 136, through the joints 149b, 139b, through the attachment portions 187, 185, respectively, and to the housing through the respective drive shafts. The joints 149b, 139b allow mechanical play between the lateral portions 146, 136 and the engagement portions 148, 138 to prevent (or at least minimize) transmission of the compression forces to the housing through the attachment portions 148, 138. However, the lateral portions 146, 136 can engage each other in other embodiments, thereby allowing more of the compression forces 56 to be transmitted through the lateral portions 146, 136.
The latch 130 comprises jaws 130a, 130b, with each jaw 130a, 130b fixedly attached to a drive shaft 172, 174, respectively, which is rotationally attached to the housing 102. The drive shafts 172, 174 can be rotated 76, 78 about axes 94, 96 by the coupling 236 which can be coupled to a rotary actuator to rotate the drive shafts 172, 174 together, but in opposite directions, as described above. It should be understood that the drive shafts 172, 174 can rotate independently of the drive shafts 176, 178. The drive shafts 172, 174 each extend through a wall 392 of the housing 102 where seals 382, 384, respectively, minimize (or prevent) fluids and/or debris from entering the chamber 106 within the housing 102 where the actuators, couplings and controllers can be contained. Jaw 130a includes an attachment portion 184, a joint 139a, a lateral portion 132, and a tapered portion 133. Jaw 130b includes an attachment portion 185, a joint 139b, a lateral portion 136, and a tapered portion 137. When the latch 130 is rotated to the engaged position, the tapered portions 133, 137 form a frusticonically shaped portion, with each of the tapered portions 133, 137 forming a circumferential portion of the frusticonically shaped portion with a gap 264 formed between the portions 133, 137. This gap 264 can have a width W3, which can be approximately 10 mm. It should be understood that the width W3 can be near zero at times if the tapered portions 133, 137 abut each other during operation of the elevator 100. However, the gap 264 can provide clearances during rotation of the latch 130 between engaged and disengaged positions and clearances to allow mud and other fluids to drain through the elevator 100 when the latches are engaged with a tubular 38. The gap 264 can lie in a plane 274 that bisects the frusticonically shaped portion of the latch 130. The plane 274 can be defined by both axes 80 and 84. It should be understood that the plane 274 that bisects the frusticonically shaped portion of the latch 130 can be parallel to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 133, 137 relative to the axis 84. It should also be understood that the gap 264 can have a width W3 that increases or decreases along the longitudinal length of the gap 274.
The latch 140 comprises jaws 140a, 140b, with each jaw 140a, 140b fixedly attached to a drive shaft 176, 178, respectively, which is rotationally attached to the housing 102. The drive shafts 176, 178 are rotated 76, 78 about axes 94, 96 by the coupling 238 which can be coupled to a rotary actuator to rotate the drive shafts 176, 178 together, but in opposite directions, as described above. The drive shafts 176, 178 each extend through a wall 394 of the housing 102 where seals 386, 388, respectively, minimize (or prevent) fluids and/or debris from entering the chamber 106 within the housing 102 where the actuators, couplings and controllers can be contained. Jaw 140a includes an attachment portion 186, a joint 149a, a lateral portion 142, and a tapered portion 143. Jaw 140b includes an attachment portion 187, a joint 149b, a lateral portion 146, and a tapered portion 147. When the latch 140 is rotated to the engaged position, the tapered portions 143, 147 form a frusticonically shaped portion, with each of the tapered portions 143, 147 forming a circumferential portion of the frusticonically shaped portion with a gap 266 formed between the portions 143, 147. This gap 266 can have a width W4, which can be approximately 10 mm. It should be understood that the width W4 can be near zero at times if the tapered portions 144, 148 abut each other during operation of the elevator 100. However, the gap 266 can also provide clearances during rotation of the latch 140 between engaged and disengaged positions. The gap 266 can lie in a plane 276 that bisects the frusticonically shaped portion of the latch 140. The plane 276 can be defined by both axes 80 and 84. It should be understood that the plane 276 that bisects the frusticonically shaped portion of the latch 140 can be parallel to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 143, 147 relative to the axis 84. It should also be understood that the gap 266 can have a width W4 that increases or decreases along the longitudinal length of the gap 276.
It should be understood that the latches 110, 120, which are not shown, may include gaps 260, 262 with widths W1, W2, respectively, and can lie in planes 270, 272, respectively. The widths W1, W2 can be approximately 10 mm. It should be understood that the widths W1 or W2 can be near zero at times if the tapered portions 113, 117 or 123, 127 abut each other during operation of the elevator 100. However, the gaps 260 and 262 can provide clearances during rotation of the respective latches 110, 120 between engaged and disengaged positions and clearances to allow mud and other fluids to drain through the elevator 100 when the latches are engaged with a tubular 38. The planes 270, 272 can be defined by both axes 80, 84 or they can be parallel to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 113, 117 and 123, 127 relative to the axis 84. It should also be understood that the gap 260 can have a width W1 that increases or decreases along the longitudinal length of the plane 270. It should also be understood that the gap 262 can have a width W2 that increases or decreases along the longitudinal length of the plane 272.
Couplings 234, 236, 238 that couple the other rotary actuators 214, 216, 218 to the latches 120, 130, and 140, respectively, can be similar to the coupling 232, or they can be different as needed to rotate the jaws in each jaw pair 120a, b, 130a,b, 140a,b in opposite directions to rotate the jaw pairs between engaged and disengaged positions. The jaw pairs 120a, b, 130a,b, 140a,b are shown in a disengaged position in
Additionally, the rotary actuators 212, 214, 216, 218 can include sensors 192, 194, 196, 198 attached the respective actuator that provides the rotational position of the rotary actuator at any time. Therefore, by sending the positional information to a controller (e.g., 50) the position of the latches 110, 120, 130, 140 can be determined with a high degree of certainty. Because the drive shafts that drive the latches are sealed to the housing 102 where they extend through a wall of the housing 102, then the position sensors 192, 194, 196, 198 are protected from the harsh fluids and debris present outside the sealed chamber 106 of the housing 102.
The elevator 100 of
The latch 130 comprises jaws 130a, 130b, with each jaw 130a, 130b fixedly attached to a drive shaft 172, 174, respectively, which is rotationally attached to the housing 102. The drive shafts 172, 174 can be rotated 76, 78 about axes 94, 96 by the coupling 236 which can be coupled to a rotary actuator to rotate the drive shafts 172, 174 together, but in opposite directions, as described above. It should be understood that the drive shafts 172, 174 can rotate independently of the drive shafts 176, 178. The drive shafts 172, 174 each extend through a wall 392 of the housing 102 where seals 382, 384, respectively, minimize (or prevent) fluids and/or debris from entering the chamber 106 within the housing 102 where the actuators, couplings and controllers can be contained. Jaw 130a includes an attachment portion 184, a joint 139a, a lateral portion 132, and a tapered portion 133. Jaw 130b includes an attachment portion 185, a joint 139b, a lateral portion 136, and a tapered portion 137. When the latch 130 is rotated to the engaged position, the tapered portions 133, 137 form a frusticonically shaped portion, with each of the tapered portions 133, 137 forming a circumferential portion of the frusticonically shaped portion with a gap 264 formed between the portions 133, 137. This gap 264 can have a width W3. It should be understood that the width W3 can be near zero at times if the tapered portions 133, 137 abut each other during operation of the elevator 100. However, the gap 264 can also provide clearances during rotation of the latch 130 between engaged and disengaged positions. The gap 264 can lie in a plane 274 that bisects the frusticonically shaped portion of the latch 130. The plane 274 can be parallel to the axis 84 and angled relative to the axis 80 by a circumferential offset 286. It should be understood that the plane 274 that bisects the frusticonically shaped portion of the latch 130 can be angled relative to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 133, 137 relative to the axis 84 and circumferentially offset from the axis 80. It should also be understood that the gap 264 can have a width W3 that increases or decreases along the longitudinal length of the gap 274.
The latch 140 comprises jaws 140a, 140b, with each jaw 140a, 140b fixedly attached to a drive shaft 176, 178, respectively, which is rotationally attached to the housing 102. The drive shafts 176, 178 are rotated 76, 78 about axes 94, 96 by the coupling 238 which can be coupled to a rotary actuator to rotate the drive shafts 176, 178 together, but in opposite directions, as described above. The drive shafts 176, 178 each extend through a wall 394 of the housing 102 where seals 386, 388, respectively, minimize (or prevent) fluids and/or debris from entering the chamber 106 within the housing 102 where the actuators, couplings and controllers can be contained. Jaw 140a includes an attachment portion 186, a joint 149a, a lateral portion 142, and a tapered portion 143. Jaw 140b includes an attachment portion 187, a joint 149b, a lateral portion 146, and a tapered portion 147. When the latch 140 is rotated to the engaged position, the tapered portions 143, 147 form a frusticonically shaped portion, with each of the tapered portions 143, 147 forming a circumferential portion of the frusticonically shaped portion with a gap 266 formed between the portions 143, 147. This gap 266 can have a width W4. It should be understood that the width W4 can be near zero at times if the tapered portions 144, 148 abut each other during operation of the elevator 100. However, the gap 266 can also provide clearances during rotation of the latch 140 between engaged and disengaged positions. The gap 266 can lie in a plane 276 that bisects the frusticonically shaped portion of the latch 140. The plane 276 can be parallel to the axis 84 and angled relative to the axis 80 by a circumferential offset 288. It should be understood that the plane 276 that bisects the frusticonically shaped portion of the latch 140 can be angled relative to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 143, 147 relative to the axis 84 and circumferentially offset from the axis 80. It should also be understood that the gap 266 can have a width W4 that increases or decreases along the longitudinal length of the gap 276.
It should be understood that the latches 110, 120, which are not shown, may include gaps 260, 262 with widths W1, W2, respectively, and can lie in planes 270, 272, respectively. The planes 270, 272 can be parallel to the axis 84 and angled relative to the axis 80 by a circumferential offset 286, 288, respectively, or the planes 270, 272 can be angled relative to the axis 80 and angled relative to the axis 84. This can result in an angled face of the tapered portions 113, 117 and 123, 127 relative to the axis 84 and circumferentially offset from the axis 80. It should also be understood that the gap 260 can have a width W1 that increases or decreases along the longitudinal length of the plane 270. It should also be understood that the gap 262 can have a width W2 that increases or decreases along the longitudinal length of the plane 272.
The jaws 130a, 130b, 140a, 140b are configured similar to the jaws 130b, 140b in the cross-sectional view of
Also, the configuration of the jaws 130a, 130b, 140a, 140b in
It should be understood that each pair of jaws, 110a-b, 120a-b, 130a-b, 140a-b can have a male/female mating feature with the male mating feature being on one of the jaws in the jaw pair and the female mating feature being on the other one of the jaws in the jaw pair. The male mating feature may engage the female mating feature when the jaw pair 110a-b, 120a-b, 130a-b, 140a-b is in the engaged position. The engagement of the male mating feature with the female mating feature can provide additional resistance to the jaw pair being pushed apart when a tubular 38 is being held by the elevator 100. For example, the male mating feature may be a bolt and the female mating feature may be a hole, with the bolt engaging the hole when the jaw pair is in the engaged (or closed) position. Additionally, the male mating feature may be a ridge and the female mating feature may be a groove, with the ridge engaging the groove when the jaw pair is in the engaged (or closed) position.
The link interface 222 can include angled flanges 226a, 226b that straddle the respective link 44 to prevent any substantially rotational movement between the link interface 222 and the respective link 44. Therefore, the link interface 222 is rotationally fixed at the azimuthal position of the link axis 86 relative to the axis 80, even though some minor rotation between the link interface 222 and the respective link 44 can occur. The engagement of the angled flanges 226a, 226b with the respective link 44 can cause the housing 102 to be rotated relative to the axis 80.
The link interface 224 can include angled flanges 228a, 228b that straddle the respective link 44 to prevent any substantially rotational movement between the link interface 224 and the respective link 44. Therefore, the link interface 224 is rotationally fixed at the azimuthal position of the link axis 86 relative to the axis 80, even though some minor rotation between the link interface 224 and the respective link 44 can occur. The engagement of the angled flanges 228a, 228b with the respective link 44 can cause the housing 102 to be rotated relative to the axis 80. The link interfaces 222, 224 are configured to rotate together to act on each link 44 of the pair of links 44 that couple the elevator 100 to a top drive 42 (or other hoisting mechanism) to rotate the housing 102 relative to the links 44.
The drive shaft 160 can be coupled to the link interface 222 via the drive shaft interface 341 and gear 342 that are fixed to the drive shaft 160. The gear 342 can be coupled to a gear 344 that is rotationally fixed to a gear 346 via shaft 349. The shaft 349 can be extended through a wall of the housing 102 and sealed at the wall to allow the rotary actuator 210 and the sensors 190, 340 to be disposed in a sealed chamber 106 to separate them from the harsh environment of the latches. The gears 344 and 346 can be connected to a position sensor 340 to can detect the rotation applied to the link interface 222 and send that position data to a controller for determining the azimuthal orientation of the housing 102 relative to the links 44. Alternatively, or in addition to, a position sensor 190 can be coupled to the drive shaft 160 to determine and report a rotational position of the drive shaft 160, which the controller (e.g., 50) can use to determine the orientation of the housing 102 relative to the links 44. The gear 346 can be coupled to a gear 348 that is rotationally fixed to the link interface 222. Therefore, rotating the drive shaft 160, causes the gear 348 to rotate, which causes the link interface 222 to rotate relative to the housing 102, and thereby rotates the housing 102 relative to the link axis 86. The direction of rotation of the drive shaft 160 determines the direction of rotation of the housing 102 relative to the link axis 86 due to the coupling 230.
The drive shaft 170 can be coupled to the link interface 224 via the drive shaft interface 351 and gear 352 that are fixed to the drive shaft 170. The gear 352 can be coupled to a gear 354 that is rotationally fixed to a gear 356 via shaft 359. The shaft 359 can be extended through a wall of the housing 102 and sealed at the wall to allow the rotary actuator 210 and the sensors 190, 340 to be disposed in a sealed chamber 106 to separate them from the harsh environment of the latches. The gear 356 can be coupled to a gear 358 that is rotationally fixed to the link interface 224. Therefore, rotating the drive shaft 170, causes the gear 358 to rotate, which causes the link interface 224 to rotate relative to the housing 102, and thereby rotates the housing 102 relative to the link axis 86. The direction of rotation of the drive shaft 170 determines the direction of rotation of the housing 102 relative to the link axis 86 due to the coupling 230. Since the rotation of the drive shafts 160 and 170 are the same, then the gears 348 and 358 rotate the link interfaces 222, 224 in the same direction.
Each of the angled flanges 226a, 226b can include a recess 294a, 294b, respectively into which a portion of the body 290 can be inserted. The angled flanges 226a, 226b can be secured to the body 290 by tightening the fasteners 292, which can prevent moving (arrows 296a, 296b) the angled flanges 226a, 226b relative to the body 290. To reduce the clearance L2, the fasteners 292 can be loosened allowing the angled flanges 226a, 226b to be extended away from the body 290. Since the angled flanges 226a, 226b are angled toward each other, the extension will reduce the clearance L2 between the angled flanges 226a, 226b. To enlarge the clearance L2, the fasteners 292 can be loosened allowing the angled flanges 226a, 226b to be retracted toward the body 290. Since the angled flanges 226a, 226b are angled toward each other, the retraction will enlarge the clearance L2 between the angled flanges 226a, 226b. Similarly, the link interface 224 can also include moveable angled flanges 226a, 226b, 228a, 228b. As can be seen, the link interfaces 222, 224 can include moveable angled flanges 226a, 226b, 228a, 228b, respectively, as shown in
The angle A2 can be in the range of “0” degrees to −95 degrees. The angle A3 can be in the range of “0” degrees to +102 degrees. Therefore, the arc A1 can be in the range of 204 degrees (i.e., from −102 degrees to +102 degrees). Therefore, the housing 102 can rotate between −102 degrees and +102 degrees about the axis 80 relative to the link axis 86. The housing 102 can rotate+/−4 degrees, +/−8 degrees, +/−12 degrees, +/−16 degrees, +/−20 degrees, +/−24 degrees, +/−28 degrees, +/−32 degrees, +/−36 degrees, +/−40 degrees, +/−44 degrees, +/−48 degrees, +/−52 degrees, +/−56 degrees, +/−60 degrees, +/−64 degrees, +/−68 degrees, +/−72 degrees, +/−76 degrees, +/−80 degrees, +/−84 degrees, +/−88 degrees, +/−92 degrees, +/−95 degrees, +/−96 degrees, +/−100 degrees, and +/−102 degrees.
The jaw 110a includes a lateral portion 112 with a protruding lip 310 that can be inserted into a recess 312 in the attachment portion 180. A lock 322a can extend through the jaw where recess 312 straddles the lip 310. The lock can be rotated to secure the lateral portion 112 to the attachment portion 180, or rotated to release the lateral portion 112 from the attachment portion 180. The lock 322a can have a feature that has a smaller width in a first position and a wider width in second position. Rotating the lock 322a rotates the feature between first and second positions. When the feature is in the smaller width position, the lateral portion 112 can be removed from or inserted into the attachment portion 180. When the feature is in the wider width position, the lateral portion 112 can be secured to the attachment portion 180 to prevent removal of the lip 310 from the recess 312. However, the lock 322a can be configured to allow some relative axial motion between the lip 310 and the recess 312, such that forces applied to the latch 110 when it is in an engaged position and a tubular 38 is engaged with the latch 110 are prevented (or at least minimized) from being transmitted through the lateral portion 112 to the attachment portion 180 via engagement of the lip 310 with the recess 312. This can reduce forces experienced by the drive shaft 162 during operation of the elevator 100. To remove the lateral portion 112 (and thus the engagement portion 114) from the attachment portion 180, the lock 322a can be disengaged allowing the lip 310 to be removed from the recess 312.
It should be understood that the cams 334a, b can be rotated into the engaged or disengaged positions by rotating the respective shafts 338a, b. The shafts 338a, b can be rotated manually by using a tool to apply a rotational force to the shafts 338a, b. Alternatively, or in addition to, the cams 334a, b can be rotated into the engaged position by the respective levers 332a, b when an adjacent jaw is rotated to their engaged position. Therefore, if the cam 334a has not yet been rotated into its engaged position when the elevator 100 is deployed, rotating either of the jaws 110a, 120a into its engaged position can engage the lever 332a and rotate the cam 334a into its engaged position. Additionally, if the cam 334b has not yet been rotated into its engaged position when the elevator 100 is deployed, rotating either of the jaws 110b, 120b into its engaged position can engage the lever 332b and rotate the cam 334b into its engaged position. In this way, the cams 334a, b can be forced into their engaged position by engaging the jaws to ensure retention of the locking ring 108 during elevator 100 operation.
The removable device 410 can include a first plate 404, and a second plate 406 slidably connected to the first plate 404 by fasteners 416. The first plate 404 and the second plate 406 can be biased apart from each other by biasing devices 408 disposed between them. The biasing devices 408 urge the second plate 406 to the ends of the fasteners 416. The first and second plates 404, 406 can have an opening 412 that is complimentarily shaped to allow the protrusions 426 of the retainer mount 420 to pass through the openings 412. The openings 412 require the removable device 410 to be aligned with the shape of the protrusions 426 to allow the removable device 410 to receive the protrusions 426 into the openings 412 (see
When installed, the bottom surface 472 of the support ring 460 can engage the housing 102 of the elevator 100. One or more alignment pins 468 can be used to ensure proper alignment of the circular weight sensor 480 to the housing 102. The top surface 478 of the engagement ring 470 can engage the spacer ring 108. Therefore, when weight is transferred to the spacer ring 108 from the latches of the elevator, then the spacer ring 108 transfers that weight to the engagement ring 470 via the top surface 478. The fasteners 466 can be used to attach the retainer ring 464 to the support ring 460. When the sealed chamber 454 is filled, the engagement ring 470 is raised up away from the support ring 460 to engage the retainer ring 464. A gap L3 can be formed between a lower internal surface of the engagement ring 470 and an upper internal surface of the support ring 460. This creates a volume between the engagement ring 470 and the support ring 460 that is the sealed chamber 454. The seals 458 can be used to generally prevent fluid communication between the sealed chamber 454 and the external environment. However, fluid communication is allowed through the outlet port 450 to the reservoir 500. The seal 474 can be used to seal the circular weight sensor 480 to the housing 102, thereby preventing (or at least minimizing) ingress of operational fluids and debris when the elevator 100 is operating.
The reservoir 500 can include a body section 516 that can be sealed on each end by a top cap 514, a bottom cap 506, and seals 518. The top cap 514 can include a borehole 526 with a piston 504 that sealingly engages the borehole 526 via the seal 528. One end of the piston 504 can be in pressure and fluid communication with the chamber 520 with the other end of the piston 504 being in pressure and fluid communication with a chamber 502. The piston 504 can also sealing engage, via a seal 530, an inner surface 532 of the body 516. A biasing device 508 can be disposed between the piston 504 and the bottom end cap 506 to provide a biasing force against the piston 504. The chamber 502 can be in fluid communication with an external environment 524 via the flow passage 522. Therefore, when the piston 504 compresses the biasing device 508, pressure in the chamber 502 remains equalized with the external environment 524 because of the flow passage 522. The biasing device 508 allows the piston 504 to move along the inner surface 532 toward the bottom cap 506 when pressure in the chamber 520 in increased and allows the piston 504 to move along the inner surface 532 toward the top cap 514 when pressure in the chamber 520 decreases.
In operation, when the circular weight sensor 480 is installed in the elevator 100, the bottom surface 472 of the support ring 460 can engage the housing 102 and the top surface 478 of the engagement ring 470 can engage the spacer ring 108. When a tubular 34 is captured by the elevator 100 the weight of the tubular 34 can be transferred from the latches of the elevator 100 to the spacer ring 108, which can then transfer the weight of the tubular to the housing 102 (see
One general aspect includes a system for conducting subterranean operations including: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore on opposite sides of, with respect to each other, a central axis of the central bore and define an opening of a first diameter; and a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a second diameter which is different than the first diameter, where the first jaw is fixedly attached to a first drive shaft and the first drive shaft is rotationally attached to the housing, where the third jaw is fixedly attached to a third drive shaft and the third drive shaft is rotationally attached to the housing, and where the first and third drive shafts independently rotate the first and third jaws, respectively, about a first axis.
Embodiments may include one or more of the following features. The system where the second jaw is fixedly attached to a second drive shaft and the second drive shaft is rotationally attached to the housing. The system may also include where the fourth jaw is fixedly attached to a fourth drive shaft and the fourth drive shaft is rotationally attached to the housing. The system may also include where the second and fourth drive shafts independently rotate the second and fourth jaws, respectively, about a second axis. The system where the first and second jaws are positioned on opposite sides of the central axis, and when the first and second jaws rotate to the engaged position the first and second jaws rotate toward each other, and when the first and second jaws rotate to the disengaged position the first and second jaws rotate away from each other. The system where the third and fourth jaws are positioned on opposite sides of the central axis, and when the third and fourth jaws rotate to the engaged position the third and fourth jaws rotate toward each other, and when the third and fourth jaws rotate to the disengaged position the third and fourth jaws rotate away from each other. The system where each of the engagement portions of the first and second jaws has a lateral portion and a tapered portion, with the tapered portion extending from the lateral portion at an angle. The system where the lateral portion of the first jaw is substantially parallel to the lateral portion of the second jaw when the first and second jaws are in the engaged position. The system where the tapered portions of the first and second jaws are configured to form a first frustoconically shaped portion of the first latch when the first and second jaws are in the engaged position, with each of the tapered portions including: an inner surface having a concave contour and being joined to a top surface of respective ones of the first and second jaws; a distal surface joined to the inner surface at an engagement edge; and an outer surface joined to the distal surface at a bottom edge and joined to a bottom surface of the respective ones of the first and second jaws.
The system where the inner and distal surfaces are tapered and angled relative to the central axis. The system where the inner surface is angled from the top surface of the respective jaw toward the central axis to the engagement edge, and the distal surface is angled from the engagement edge away from the central axis to the bottom edge. The system where the engagement edge or the inner surface is configured to engage a portion of the tubular when the first and second jaws are in the engaged position. The system where the elevator is configured to be EX-certified according to EX zone 1 (ATEX/IECEx), and an electronics controller configured to control the elevator is disposed within a chamber of the housing. The system where a rotary actuator is coupled to the first and second drive shafts and simultaneously rotates the first and second drive shafts in opposite directions, thereby rotating the first and second jaws between engaged and disengaged positions. The system where the first and second drive shafts extend through a wall of the housing, and where each one of the first and second drive shafts engage one or more seals, thereby preventing fluid communication through the wall at either of the first and second drive shafts. The system where the rotary actuator is disposed in a chamber within the housing, the chamber being sealed to prevent environmental fluids or debris from entering the chamber. The system where the second latch engages the first latch when the first and second latches are in the engaged position. The system where the first and second jaws of the first latch are configured to form a first frustoconically shaped portion of the first latch when the first latch is in the engaged position. The system may also include where the third and fourth jaws of the first latch are configured to form a second frustoconically shaped portion of the second latch when the second latch is in the engaged position.
The system may also include where a majority of an outer surface of the second frustoconically shaped portion abuts an inner surface of the first frustoconically shaped portion when the first and second latches are in the engaged position. The system where the first frustoconically shaped portion includes a first gap between the first and second jaws when the first latch is in the engaged position, and where the second frustoconically shaped portion includes a second gap between the third and fourth jaws when the second latch is in the engaged position. The system where the first and second gaps are parallel to the central axis of the housing, and the first and second gaps are circumferentially aligned with each other relative to the central axis. The system where the first and second gaps are parallel to the central axis of the housing, and the first gap is circumferentially offset, relative to the central axis, from the second gap. The system where each of the engagement portions of the first, second, third, and fourth jaws has a lateral portion and a tapered portion, with the tapered portion extending from the lateral portion at an angle. The system where the lateral portion of the first jaw is parallel to the lateral portion of the second jaw when the first and second jaws are in the engaged position, where the lateral portion of the third jaw is parallel to the lateral portion of the fourth jaw when the third and fourth jaws are in the engaged position, and where a majority of the engagement portions of the third and fourth jaws overlie the engagement portions of the first and second jaws when the first, second, third, and fourth jaws are in the engaged position.
The system where the tapered portions of the first and second jaws are configured to form a first frustoconically shaped portion of the first latch when the first and second jaws are in the engaged position, and where the tapered portions of the third and fourth jaws are configured to form a second frustoconically shaped portion of the second latch when the third and fourth jaws are in the engaged position, with each of the tapered portions including: an inner surface having a concave contour and being joined to a top surface of respective ones of the jaws; a distal surface joined to the inner surface at an engagement edge; and an outer surface joined to the distal surface at a bottom edge and joined to a bottom surface of the respective ones of the jaws. The system where the inner and distal surfaces are tapered and angled relative to the central axis.
The system where the inner surface is angled from the top surface of the respective jaw toward the central axis to the engagement edge, and the distal surface is angled from the engagement edge away from the central axis to the bottom edge. The system where at least one of the engagement edges or the inner surfaces is configured to engage a portion of the tubular when the jaws are in the engaged position. The system where a minimum diameter of the second frustoconically shaped portion is smaller than a minimum diameter of the first frustoconically shaped portion. The system where the tapered portions of the third and fourth jaws engage the tapered portions of the first and second jaws and the lateral portions of the third and fourth jaws engage the lateral portions of the first and second jaws when the jaws are in the engaged position. The system may also include where a perimeter ridge at a top of the tapered portions of the first and second jaws extends into a perimeter recess in a surface of the lateral portions of the third and fourth jaws that engage the first and second jaws when the jaws are in the engaged position. The system where a first rotary actuator is coupled to the first and second drive shafts and simultaneously rotates the first and second drive shafts in opposite directions, thereby rotating the first and second jaws between engaged and disengaged positions.
The system may also include where a second rotary actuator is coupled to the third and fourth drive shafts and simultaneously rotates the third and fourth drive shafts in opposite directions, thereby rotating the third and fourth jaws between engaged and disengaged positions. The system where the first and second drive shafts extend through a wall of the housing, and where each one of the first and second drive shafts engage one or more seals, thereby preventing fluid communication through the wall at either of the first and second drive shafts. The system may also include where the third and fourth drive shafts extend through a wall of the housing, and where each one of the third and fourth drive shafts engage one or more seals, thereby preventing fluid communication through the wall at either of the third and fourth drive shafts. The system where the rotary actuators are disposed in a chamber within the housing, the chamber being sealed to prevent environmental fluids or debris from entering the chamber.
The system further including: a third latch including fifth and sixth jaws, with each of the fifth and sixth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the fifth and sixth jaws are in the engaged position, engagement portions of the fifth and sixth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a third diameter which is different than the first and second diameters, and a fourth latch including seventh and eighth jaws, with each of the seventh and eighth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the seventh and eighth jaws are in the engaged position, engagement portions of the seventh and eighth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a fourth diameter which is different than the first, second, and third diameters where the engagement portions of the fifth and sixth jaws are configured to be nested in the engagement portions of the third and fourth jaws when the fifth and sixth jaws are in the engaged position, and where the engagement portions of the seventh and eighth jaws are configured to be nested in the engagement portions of the fifth and sixth jaws when the seventh and eighth jaws are in the engaged position. The system where the fifth jaw is fixedly attached to a fifth drive shaft and the fifth drive shaft is rotationally attached to the housing.
The system may also include where the sixth jaw is fixedly attached to a sixth drive shaft and the sixth drive shaft is rotationally attached to the housing. The system may also include where the seventh jaw is fixedly attached to a seventh drive shaft and the seventh drive shaft is rotationally attached to the housing. The system may also include where the eighth jaw is fixedly attached to an eighth drive shaft and the eighth drive shaft is rotationally attached to the housing. The system may also include where the fifth and seventh drive shafts independently rotate the fifth and seventh jaws, respectively, about a third axis. The system may also include where the sixth and eighth drive shafts independently rotate the sixth and eighth jaws, respectively, about a fourth axis. The system where the first and second axes are disposed on opposite sides of the central axis of the housing and at a same longitudinal position along the central axis, where the third and fourth axes are disposed on opposite sides of the central axis and at a same longitudinal position along the central axis, and where the first and second axes are positioned radially inward from the third and fourth axes. The system where when the first latch rotates to the engaged position the first and second jaws rotate toward each other, and when the first latch rotates to the disengaged position the first and second jaws rotate away from each other.
The system may also include where when the second latch rotates to the engaged position the third and fourth jaws rotate toward each other, and when the second latch rotates to the disengaged position the third and fourth jaws rotate away from each other. The system where when the third latch rotates to the engaged position the fifth and sixth jaws rotate toward each other, and when the third latch rotates to the disengaged position the fifth and sixth jaws rotate away from each other. The system may also include where when the fourth latch rotates to the engaged position the seventh and eighth jaws rotate toward each other, and when the fourth latch rotates to the disengaged position the seventh and eighth jaws rotate away from each other. The system where each of the engagement portions of the first, second, third, fourth, fifth, sixth, seventh, and eighth jaws has a lateral portion and a tapered portion, with the tapered portion extending from the lateral portion at an angle. The system may also include where the lateral portion of the first jaw is parallel to the lateral portion of the second jaw when the first latch is in the engaged position. The system may also include where the lateral portion of the third jaw is parallel to the lateral portion of the fourth jaw when the second latch is in the engaged position. The system may also include where the lateral portion of the fifth jaw is parallel to the lateral portion of the sixth jaw when the third latch is in the engaged position. The system may also include where the lateral portion of the seventh jaw is parallel to the lateral portion of the eighth jaw when the fourth latch is in the engaged position.
The system may also include where the tapered portions of the first and second jaws are configured to form a first frustoconically shaped portion when the first latch is in the engaged position. The system may also include where the tapered portions of the third and fourth jaws are configured to form a second frustoconically shaped portion when the second latch is in the engaged position. The system may also include where the tapered portions of the fifth and sixth jaws are configured to form a third frustoconically shaped portion when the third latch is in the engaged position. The system may also include where the tapered portions of the seventh and eighth jaws are configured to form a fourth frustoconically shaped portion when the fourth latch is in the engaged position, with each of the tapered portions including: an inner surface having a concave contour and being joined to a top surface of respective ones of the jaws, a distal surface joined to the inner surface at an engagement edge, and an outer surface joined to the distal surface at a bottom edge and joined to a bottom surface of the respective ones of the jaws. The system where the inner and distal surfaces are tapered and angled relative to the central axis. The system where the inner surface is angled from the top surface of the respective jaw toward the central axis to the engagement edge, and the distal surface is angled from the engagement edge away from the central axis to the bottom edge. The system where the engagement edge or the inner surface is configured to engage a portion of the tubular when at least one of the latches is in the engaged position. The system may also include the first jaw is fixedly attached to a first drive shaft that is rotationally attached to the housing.
The system may also include the second jaw is fixedly attached to a second drive shaft that is rotationally attached to the housing. The system may also include the third jaw is fixedly attached to a third drive shaft that is rotationally attached to the housing. The system may also include the fourth jaw is fixedly attached to a fourth drive shaft that is rotationally attached to the housing. The system may also include where a first rotary actuator is coupled to the first and second drive shafts and simultaneously rotates the first and second drive shafts in opposite directions, thereby rotating the first and second jaws between engaged and disengaged positions. The system may also include where a second rotary actuator is coupled to the third and fourth drive shafts and simultaneously rotates the third and fourth drive shafts in opposite directions, thereby rotating the third and fourth jaws between engaged and disengaged positions. The system may also include the fifth jaw is fixedly attached to a fifth drive shaft that is rotationally attached to the housing. The system may also include the sixth jaw is fixedly attached to a sixth drive shaft that is rotationally attached to the housing. The system may also include the seventh jaw is fixedly attached to a seventh drive shaft that is rotationally attached to the housing. The system may also include the eighth jaw is fixedly attached to an eighth drive shaft that is rotationally attached to the housing.
The system may also include where a third rotary actuator is coupled to the fifth and sixth drive shafts and simultaneously rotates the fifth and sixth drive shafts in opposite directions, thereby rotating the fifth and sixth jaws between engaged and disengaged positions. The system may also include where a fourth rotary actuator is coupled to the seventh and eighth drive shafts and simultaneously rotates the seventh and eighth drive shafts in opposite directions, thereby rotating the seventh and eighth jaws between engaged and disengaged positions. The system where each one of the drive shafts extend through a wall of the housing, and where each one of the drive shafts engage one or more seals, thereby preventing fluid communication through the wall at any of the drive shafts. The system where the rotary actuators are disposed in a chamber within the housing, the chamber being sealed to prevent environmental fluids or debris from entering the chamber. The system where the second latch engages the first latch when the first and second latches are in the engaged position. The system where the third latch engages the second latch when the second and third latches are in the engaged position. The system where the fourth latch engages the third latch when the third and fourth latches are in the engaged position. The system where the first and second jaws of the first latch are configured to form a first frustoconically shaped portion of the first latch when the first latch is in the engaged position.
The system may also include where the third and fourth jaws of the first latch are configured to form a second frustoconically shaped portion of the second latch when the second latch is in the engaged position. The system may also include where a majority of an outer surface of the second frustoconically shaped portion abuts an inner surface of the first frustoconically shaped portion when the first and second latches are in the engaged position. The system where the first frustoconically shaped portion includes a first gap between the first and second jaws when the first latch is in the engaged position. The system may also include where the second frustoconically shaped portion includes a second gap between the third and fourth jaws when the second latch is in the engaged position. The system where the first and second gaps are parallel to the central axis of the housing, and the first and second gaps are circumferentially aligned with each other relative to the central axis. The system where the first and second gaps are parallel to the central axis of the housing, and the first gap is circumferentially offset, relative to the central axis, from the second gap. The system where the fifth and sixth jaws of the third latch are configured to form a third frustoconically shaped portion of the third latch when the third latch is in the engaged position. The system may also include where a majority of an outer surface of the third frustoconically shaped portion abuts an inner surface of the second frustoconically shaped portion when the second and third latches are in the engaged position. The system where the seventh and eighth jaws of the fourth latch are configured to form a fourth frustoconically shaped portion of the fourth latch when the fourth latch is in the engaged position.
The system may also include where a majority of an outer surface of the fourth frustoconically shaped portion abuts an inner surface of the third frustoconically shaped portion when the third and fourth latches are in the engaged position. The system where the third frustoconically shaped portion includes a third gap between the fifth and sixth jaws when the third latch is in the engaged position. The system may also include where the fourth frustoconically shaped portion includes a fourth gap between the seventh and eighth jaws when the fourth latch is in the engaged position. The system where the third and fourth gaps are parallel to the central axis of the housing, and the third and fourth gaps are circumferentially aligned with each other relative to the central axis. The system where the third and fourth gaps are parallel to the central axis of the housing, and the third gap is circumferentially offset, relative to the central axis, from the fourth gap.
The system further including a link interface system configured to rotate the housing up to greater than 90 degrees about a housing axis, the housing axis being perpendicular to the central axis, the link interface system including a rotary actuator, the rotary actuator including a body and a drive shaft, where the body is fixedly attached to the housing and the drive shaft is coupled to a link interface that is rotationally attached to the housing, and where when the drive shaft is rotated by the rotary actuator, the link interface is rotated about the housing axis. The system further including a link interface system configured to rotate the housing about a housing axis, the housing axis being perpendicular to the central axis, where the link interface is configured to engage a pair of links and rotate the housing relative to the links within a range of +/−4 degrees, +/−8 degrees, +/−12 degrees, +/−16 degrees, +/−20 degrees, +/−24 degrees, +/−28 degrees, +/−32 degrees, +/−36 degrees, +/−40 degrees, +/−44 degrees, +/−48 degrees, +/−52 degrees, +/−56 degrees, +/−60 degrees, +/−64 degrees, +/−68 degrees, +/−72 degrees, +/−76 degrees, +/−80 degrees, +/−84 degrees, +/−88 degrees, +/−92 degrees, +/−95 degrees, +/−96 degrees, +/−100 degrees, and +/−102 degrees, relative to an axis of at least one of the links. The system further including a hydraulic generator and an energy storage device, where the hydraulic generator generates electrical energy for operation of the elevator and stores a portion of the electrical energy in the energy storage device. The system where the storage device is a capacitor assembly. The system where the elevator is configured to be ATEX certified or IECEx certified according to ex zone 1 requirements. The system where the elevator, with the housing in a substantially horizontal orientation, is configured to support a tubular that weighs up to 1180 metric tons (˜ 1300 short tons), or up to 1134 metric tons (˜1250 short tons), or up to 1189 metric tons (˜ 1200 short tons), or up to 907 metric tons (˜1000 short tons), or up to 680 metric tons (˜750 short tons), or up to 454 metric tons (˜500 short tons), or up to 318 metric tons (˜350 short tons), or up to 227 metric tons (˜250 short tons). The system further including a top drive coupled to the elevator housing via a pair of links, with each of the links rotationally attached to the top drive at one end and rotationally attached to the housing at an opposite end.
The system further including a first lock for the first jaw, where the first lock retains a lateral portion of the first jaw to an attachment portion of the first jaw, and where the attachment portion of the first jaw is fixedly attached to the first drive shaft. The system further including a third lock for the third jaw, where the third lock retains a lateral portion of the third jaw to an attachment portion of the third jaw, and where the attachment portion of the third jaw is fixedly attached to the third drive shaft. The first lock engages a portion of the housing adjacent a spacer ring in the elevator when the first jaw is in the engaged position, and the third lock engages the first lock when the third jaw is in the engaged position, and where hydraulic force applied to the first and third jaws by rotary actuators is transferred through the first and third locks to the housing, thereby bypassing the spacer ring.
The system further including a spacer ring that engages the first and second jaws when the first and second jaws are in the engaged position, a shaft in the housing with a lever on one end and a cam on an opposite end, where rotation of the shaft engages the cam with a recess in the spacer ring, such that removal of the spacer ring from the housing is prevented. The shaft is rotated when the first jaw is rotated into the engaged position.
The system further including a pair of link interfaces configured to rotatably attach a pair of links to respective supports of the elevator that extend from opposite sides of the elevator, wherein each link is retained on the respective support by a removable device, and where the removable device can be installed by aligning an opening through the removable device with a retention feature of a retainer mount, receiving the retention feature within the opening, compressing two plates of the removable device together, rotating the removable device relative to the retention feature, and releasing the two plates to expand away from each other when the retention feature aligns with recesses on the removable device, thereby securing the removable device on the support.
One general aspect includes a system for conducting subterranean operations including: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein, the central bore having a central axis; and a link interface system configured to rotate the housing up to greater than 90 degrees about a housing axis.
Embodiments may include one or more of the following features. The system where the link interface system is configured to engage a pair of links and rotate the housing relative to the links within a range of +/−4 degrees, +/−8 degrees, +/−12 degrees, +/−16 degrees, +/−20 degrees, +/−24 degrees, +/−28 degrees, +/−32 degrees, +/−36 degrees, +/−40 degrees, +/−44 degrees, +/−48 degrees, +/−52 degrees, +/−56 degrees, +/−60 degrees, +/−64 degrees, +/−68 degrees, +/−72 degrees, +/−76 degrees, +/−80 degrees, +/−84 degrees, +/−88 degrees, +/−92 degrees, +/−95 degrees, +/−96 degrees, +/−100 degrees, and +/−102 degrees relative to an axis of at least one of the links. The system further including a hydraulic generator and an energy storage device, where the hydraulic generator generates electrical energy for operation of the elevator and stores a portion of the electrical energy in the energy storage device. The system where the storage device is a capacitive assembly. The system where the elevator is configured to be ATEX certified or IECEx certified according to EX Zone 1 requirements. The system where the elevator, with the housing in a substantially horizontal orientation, is configured to support a tubular that weighs up to 1180 metric tons (˜ 1300 short tons), or up to 1134 metric tons (˜ 1250 short tons), or up to 1189 metric tons (˜ 1200 short tons), or up to 907 metric tons (˜ 1000 short tons), or up to 680 metric tons (˜ 750 short tons), or up to 454 metric tons (˜ 500 short tons), or up to 318 metric tons (˜ 350 short tons), or up to 227 metric tons (˜ 250 short tons). The system where the elevator is configured to manipulate the tubular between horizontal and vertical orientations, and where the tubular weighs up to 3000 kg (˜ 3 short tons). The system where the elevator further includes one or more sensors disposed between a spacer ring and the housing, and a controller, where the sensors detect a force applied between the spacer ring and the housing, and the controller is configured to determine a weight of the tubular supported by the elevator.
The system further including a top drive coupled to the elevator housing via a pair of links, with each of the links rotationally attached to the top drive at one end and rotationally attached to the housing at an opposite end. The system where the housing axis is perpendicular to the central axis, where the link interface system includes a rotary actuator having a body and a drive shaft, with the body fixedly attached to the housing and the drive shaft coupled to a link interface that is rotationally attached to the housing, and where when the drive shaft is rotated by the rotary actuator, the link interface is rotated about the housing axis. The system further including a sensor that detects an angular position of the housing relative to the link interface, where the sensor is disposed within a sealed chamber of the housing that prevents a portion of environmental fluids from entering the sealed chamber during the subterranean operations. The system further including a rotary actuator coupled to each pair of jaws of the elevator and a sensor coupled to each rotary actuator, where the sensor detects an angular position of the rotary actuator, and a controller is configured to determine whether one or more of the jaws are in an engaged or disengaged position. The system further including: a rig; a top drive supported by the rig; a pair of links rotatably attached to the top drive; and the elevator rotatably attached to the pair of links. The system further including a link interface system configured to interface with any one of a plurality of links with at least one of the plurality of links having a first diameter, another one of the plurality of links having a second diameter, with the first diameter being different than the second diameter.
The link interface system further including at least one pair of angled flanges that are configured to vary a clearance between angled flanges of the at least one pair of angle flanges from a first clearance to a second clearance, where the first clearance allows the angled flanges of the at least one pair of angled flanges to straddle a link with the first diameter and prevents the angled flanges of the at least one pair of angled flanges from straddling a link with the second diameter.
One general aspect includes a system for conducting subterranean operations including: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore; a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore; and an electronics enclosure within the housing, with the electronics enclosure configured to be ATEX certified or IECEx certified according to EX Zone 1 requirements.
Embodiments may include one or more of the following features. The system further including an electronics controller disposed in the enclosure and configured to control the elevator to handle the tubular. The system further including a hydraulic generator and an energy storage device, where the hydraulic generator generates electrical energy for operation of the elevator and stores a portion of the electrical energy in the energy storage device. The system where the storage device is a capacitive assembly or a battery, and where the storage device is disposed within the electronics enclosure.
One general aspect includes a system for conducting subterranean operations including: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are positioned in the central bore on opposite sides of, with respect to each other, a central axis of the central bore and define an opening of a first diameter; a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are positioned in the central bore on opposite sides of, with respect to each other, the central axis of the central bore and define an opening of a second diameter which is different than the first diameter; and an electronics controller disposed in an electronics enclosure within the housing and configured to control the elevator to handle the tubular.
Embodiments may include one or more of the following features. The system where the electronics enclosure is configured to be ATEX certified or IECEx certified according to EX Zone 1 requirements.
One general aspect includes a system for conducting subterranean operations including: an elevator configured to move a tubular, the elevator including: a housing defining a central bore configured to receive the tubular therein; a first latch including first and second jaws, with each of the first and second jaws being coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the first and second jaws are in the engaged position, engagement portions of the first and second jaws are configured to form a first frustoconically shaped portion positioned in the central bore and surrounding a central axis of the central bore, where the first frustoconically shaped portion defines an opening of a first diameter; and a second latch including third and fourth jaws, with each of the third and fourth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the third and fourth jaws are in the engaged position, engagement portions of the third and fourth jaws are configured to form a second frustoconically shaped portion positioned in the central bore and surrounding the central axis of the central bore, where the second frustoconically shaped portion defines an opening of a second diameter which is different than the first diameter, where the first frustoconically shaped portion includes a first gap between the first and second jaws when the first latch is in the engaged position, and where the second frustoconically shaped portion includes a second gap between the third and fourth jaws when the second latch is in the engaged position, and where the first and second gaps are parallel to the central axis, and the first gap is circumferentially offset, relative to the central axis, from the second gap.
Embodiments may include one or more of the following features. The system further including: a third latch including fifth and sixth jaws, with each of the fifth and sixth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the fifth and sixth jaws are configured to form a third frustoconically shaped portion positioned in the central bore and surrounding the central axis of the central bore, where the third frustoconically shaped portion defines an opening of a third diameter which is different than the first and second diameters, and a fourth latch including seventh and eighth jaws, with each of the seventh and eighth jaws coupled to the housing and configured to be moveable between an engaged position and a disengaged position, and when the seventh and eighth jaws are configured to form a fourth frustoconically shaped portion positioned in the central bore and surrounding the central axis of the central bore, where the fourth frustoconically shaped portion defines an opening of a fourth diameter which is different than the first, second, and third diameters, where the third frustoconically shaped portion includes a third gap between the fifth and sixth jaws when the third latch is in the engaged position, and where the fourth frustoconically shaped portion includes a fourth gap between the seventh and eighth jaws when the fourth latch is in the engaged position, and where the third and fourth gaps are parallel to the central axis, and the third gap is circumferentially offset, relative to the central axis, from the fourth gap. The system where the first and third gaps are circumferentially aligned relative to the central axis. The system where the second and fourth gaps are circumferentially aligned relative to the central axis.
Embodiment 1. A system for conducting subterranean operations comprising:
Embodiment 2. The system of embodiment 1, wherein the link interface system is configured to engage a pair of links and rotate the housing relative to the links within a range of +/−4 degrees, +/−8 degrees, +/−12 degrees, +/−16 degrees, +/−20 degrees, +/−24 degrees, +/−28 degrees, +/−32 degrees, +/−36 degrees, +/−40 degrees, +/−44 degrees, +/−48 degrees, +/−52 degrees, +/−56 degrees, +/−60 degrees, +/−64 degrees, +/−68 degrees, +/−72 degrees, +/−76 degrees, +/−80 degrees, +/−84 degrees, +/−88 degrees, +/−92 degrees, +/−95 degrees, +/−96 degrees, +/−100 degrees, and +/−102 degrees relative to an axis of at least one of the links.
Embodiment 3. The system of embodiment 1, further comprising a hydraulic generator and an energy storage device, wherein the hydraulic generator generates electrical energy for operation of the elevator and stores a portion of the electrical energy in the energy storage device.
Embodiment 4. The system of embodiment 3, wherein the storage device is a capacitive assembly.
Embodiment 5. The system of embodiment 4, wherein the elevator is configured to be ATEX certified or IECEx certified according to EX Zone 1 requirements.
Embodiment 6. The system of embodiment 1, wherein the elevator, with the housing in a substantially horizontal orientation, is configured to support a tubular that weighs up to 1180 metric tons (˜ 1300 short tons), or up to 1134 metric tons (˜ 1250 short tons), or up to 1189 metric tons (˜ 1200 short tons), or up to 907 metric tons (˜ 1000 short tons), or up to 680 metric tons (˜ 750 short tons), or up to 454 metric tons (˜ 500 short tons), or up to 318 metric tons (˜ 350 short tons), or up to 227 metric tons (˜ 250 short tons).
Embodiment 7. The system of embodiment 1, wherein the elevator is configured to manipulate the tubular between horizontal and vertical orientations, and wherein the tubular weighs up to 3000 kg (˜ 3 short tons).
Embodiment 8. The system of embodiment 1, wherein the elevator further comprises one or more sensors disposed between a spacer ring and the housing, and a controller, wherein the sensors detect a force applied between the spacer ring and the housing, and the controller is configured to determine a weight of the tubular supported by the elevator.
Embodiment 9. The system of embodiment 1, further comprising a top drive coupled to the elevator housing via a pair of links, with each of the links rotationally attached to the top drive at one end and rotationally attached to the housing at an opposite end.
Embodiment 10. The system of embodiment 1, wherein the housing axis is perpendicular to the central axis, wherein the link interface system comprises a rotary actuator having a body and a drive shaft, with the body fixedly attached to the housing and the drive shaft coupled to a link interface that is rotationally attached to the housing, and wherein when the drive shaft is rotated by the rotary actuator, the link interface is rotated about the housing axis.
Embodiment 11. The system of embodiment 10, further comprising a sensor that detects an angular position of the housing relative to the link interface, wherein the sensor is disposed within a sealed chamber of the housing that prevents a portion of environmental fluids from entering the sealed chamber during the subterranean operations.
Embodiment 12. The system of embodiment 1, further comprising a rotary actuator coupled to each pair of jaws of the elevator and a sensor coupled to each rotary actuator, wherein the sensor detects an angular position of the rotary actuator, and a controller is configured to determine whether one or more of the jaws are in an engaged or disengaged position.
Embodiment 13. The system of embodiment 1, further comprising:
Embodiment 14. The system of embodiment 1, wherein the link interface system is configured to interface with any one of a plurality of links with at least one of the plurality of links having a first diameter, another one of the plurality of links having a second diameter, and the first diameter is different than the second diameter.
Embodiment 15. The system of embodiment 14, wherein the link interface system comprises at least one pair of angled flanges that are configured to vary a clearance between angled flanges of the at least one pair of angle flanges from a first clearance to a second clearance, wherein the first clearance allows the angled flanges of the at least one pair of angled flanges to straddle a link with the first diameter and prevents the angled flanges of the at least one pair of angled flanges from straddling a link with the second diameter.
Embodiment 16. A system for conducting subterranean operations comprising:
Embodiment 17. The system of embodiment 16, wherein the electronics enclosure is configured to be ATEX certified or IECEx certified according to EX Zone 1 requirements.
Embodiment 18. The system of embodiment 17, further comprising an electronics controller disposed in the enclosure and configured to control the elevator to handle the tubular.
Embodiment 19. The system of embodiment 17, further comprising a hydraulic generator and an energy storage device, wherein the hydraulic generator generates electrical energy for operation of the elevator and stores a portion of the electrical energy in the energy storage device.
Embodiment 20. The system of embodiment 19, wherein the storage device is a capacitive assembly or a battery, and wherein the storage device is disposed within the electronics enclosure.
While the present disclosure may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and tables and have been described in detail herein. However, it should be understood that the embodiments are not intended to be limited to the particular forms disclosed. Rather, the disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure as defined by the following appended claims. Further, although individual embodiments are discussed herein, the disclosure is intended to cover all combinations of these embodiments.
Friestad, Jan, Mikalsen, Kenneth, Larsen, Ørjan H., Lingjerde, Bjørnar
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